fpliii
09-05-2012, 08:09 PM
It's definitely a tight rope, and obviously posters are going to have differing opinions on what exactly should or shouldn't be weighed more heavily.
Unfortunately defense is a hard thing to measure. The few recordable defensive stats that we keep track of weren't recorded in Russells day. The few defensive stats that we do have from that era paint him in a pretty positive light though.
I don't put an enormous amount of stock in Defensive win shares, but over the course of several years they have to have at least some merit, especially when we're dealing with this big of a gap. Below are there top 6 seasons
Bill Russell
16.0
14.4
12.6
11.6
11.4
11.3
Hakeem Olajuwon
8.7
8.0
7.9
7.8
6.8
6.6
Tim Duncan
7.2
7.2
7.1
7.1
6.9
6.9
Shaquille O'Neal
7.0
6.0
4.8
4.6
4.4
4.0
Also, the year before the Bill arrived in Boston, the Celtics were the 2nd worst defensive team in the league. Once he joined, they rocketed up six spots to become the best defensive team in the league, and then stayed that way for the next twelve seasons. Once Bill retired they drop back down to a mere average defensive team. I really can't think of any other player before or since who's defense has had such a profound impact on the game. What other player is capable of taking a team that's in the bottom half of the league defensively and making them the best defensive team for the next thirteen years? What player is capable of accomplishing that same feat offensively? I can't think of any.
I see Bill Russell's defense as I do Rodman's rebounding, an outlier amongst outliers, for which we may never see a suitable equivalent.
If you haven't already read this, it's worth a read
http://www.backpicks.com/2010/12/31/bill-russells-defensive-impact/
I doubt it will change your mind, but it's quite the interesting read nonetheless . I can certainly see the argument for those three guys depending on how highly you value individual scoring. Also consider the fact that Russell was a better rebounder, and significantly better passer than all three of those guys. Scoring the basketball is really the only thing on court that they did better than Russell, albeit that one thing is pretty damn important.
It's a bit harder to measure something like leadership and off court impact, but I'd say it's safe to give Russell the edge there based on what we do know. He was there defensive floor general all thirteen years and coach from 66-69.
For a guy like Russell it's not as difficult to measure defense, since he was the defensive anchor. As the lynchpin of the Celtics' defenses, the team DRtgs you linked paint a great picture of his impact.
As for DWS, there's a problem comparing across eras:
B. 1951-52 to 1972-73 NBA
Prior to the 1973-74 season, the NBA did not track defensive rebounds, steals, or blocks, so allocating defensive credit is a difficult task. Nevertheless, here is the process for crediting Defensive Win Shares in those seasons (once again using Robertson in 1964-65 as an example):
1. Calculate team marginal defense. Team marginal defense is equal to 1.08 * (league points per shot attempt) * (team field goal attempts + 0.44 * (team free throw attempts)) - (opponent points). If you're wondering why we're using team shot attempts as opposed to opponent shot attempts, the answer is (a) we don't have opponent shot attempts prior to 1970-71 and (b) the system works better using team shot attempts. For the 1964-65 Royals we get 1.08 * 0.9578 * (7797 + 0.44 * 2866) - 8952 = 417.854.
2. Calculate the player's share of the team's marginal defense. The player's share of the team's marginal defense is equal to 0.25 * ((minutes played) / (team minutes played)) + 0.5 * ((total rebounds) / (team total rebounds)) + 0.25 * ((assists) / (team assists)). How did I get those weights? Modern Defensive Win Shares are most dependent on minutes played, defensive rebounds, steals, and blocks. I regressed DWS on those stats and then found the relative importance of each regressor (approximately 25% for minutes played, 35% for defensive rebounds, 25% for steals, and 15% for blocks). Since those defensive statistics are not available for past seasons, I used total rebounds as a proxy for defensive rebounds and blocks; and assists as a proxy for steals. A couple more notes: (1) prior to the 1964-65 season, team minutes played were not an official statistic, so for those seasons estimate the team's minutes played using the formula 5 * 48 * (team games) + 125; and (2) prior to the 1967-68 season, team total rebounds included team rebounds, so to account for this multiply the team total by 0.875. Getting back to our example, Robertson's share on the 1964-65 Royals is equal to 0.25 * (3421 / 19325) + 0.5 * (674 / (0.875 * 5387)) + 0.25 * (861 / 1843) = 0.2325.
3. Calculate marginal defense for each player. Marginal defense is equal to (team marginal defense) * (player share). For Robertson this is 417.854 * 0.2325 = 97.151. Note that this formula may produce a negative result for some players.
4. Calculate marginal points per win. Marginal points per win reduces to 0.16 * (team points per game + opponent points per game). For the 1964-65 Royals this is 0.16 * (114.2 + 111.9) = 36.176.
5. Credit defensive Win Shares to the players. Defensive Win Shares are credited using the following formula: (marginal defense) / (marginal points per win). Robertson gets credit for 97.151 / 36.176 = 2.69 Defensive Win Shares.
link (http://www.basketball-reference.com/about/ws.html)
I have a few problems with this methodology.
Unfortunately defense is a hard thing to measure. The few recordable defensive stats that we keep track of weren't recorded in Russells day. The few defensive stats that we do have from that era paint him in a pretty positive light though.
I don't put an enormous amount of stock in Defensive win shares, but over the course of several years they have to have at least some merit, especially when we're dealing with this big of a gap. Below are there top 6 seasons
Bill Russell
16.0
14.4
12.6
11.6
11.4
11.3
Hakeem Olajuwon
8.7
8.0
7.9
7.8
6.8
6.6
Tim Duncan
7.2
7.2
7.1
7.1
6.9
6.9
Shaquille O'Neal
7.0
6.0
4.8
4.6
4.4
4.0
Also, the year before the Bill arrived in Boston, the Celtics were the 2nd worst defensive team in the league. Once he joined, they rocketed up six spots to become the best defensive team in the league, and then stayed that way for the next twelve seasons. Once Bill retired they drop back down to a mere average defensive team. I really can't think of any other player before or since who's defense has had such a profound impact on the game. What other player is capable of taking a team that's in the bottom half of the league defensively and making them the best defensive team for the next thirteen years? What player is capable of accomplishing that same feat offensively? I can't think of any.
I see Bill Russell's defense as I do Rodman's rebounding, an outlier amongst outliers, for which we may never see a suitable equivalent.
If you haven't already read this, it's worth a read
http://www.backpicks.com/2010/12/31/bill-russells-defensive-impact/
I doubt it will change your mind, but it's quite the interesting read nonetheless . I can certainly see the argument for those three guys depending on how highly you value individual scoring. Also consider the fact that Russell was a better rebounder, and significantly better passer than all three of those guys. Scoring the basketball is really the only thing on court that they did better than Russell, albeit that one thing is pretty damn important.
It's a bit harder to measure something like leadership and off court impact, but I'd say it's safe to give Russell the edge there based on what we do know. He was there defensive floor general all thirteen years and coach from 66-69.
For a guy like Russell it's not as difficult to measure defense, since he was the defensive anchor. As the lynchpin of the Celtics' defenses, the team DRtgs you linked paint a great picture of his impact.
As for DWS, there's a problem comparing across eras:
B. 1951-52 to 1972-73 NBA
Prior to the 1973-74 season, the NBA did not track defensive rebounds, steals, or blocks, so allocating defensive credit is a difficult task. Nevertheless, here is the process for crediting Defensive Win Shares in those seasons (once again using Robertson in 1964-65 as an example):
1. Calculate team marginal defense. Team marginal defense is equal to 1.08 * (league points per shot attempt) * (team field goal attempts + 0.44 * (team free throw attempts)) - (opponent points). If you're wondering why we're using team shot attempts as opposed to opponent shot attempts, the answer is (a) we don't have opponent shot attempts prior to 1970-71 and (b) the system works better using team shot attempts. For the 1964-65 Royals we get 1.08 * 0.9578 * (7797 + 0.44 * 2866) - 8952 = 417.854.
2. Calculate the player's share of the team's marginal defense. The player's share of the team's marginal defense is equal to 0.25 * ((minutes played) / (team minutes played)) + 0.5 * ((total rebounds) / (team total rebounds)) + 0.25 * ((assists) / (team assists)). How did I get those weights? Modern Defensive Win Shares are most dependent on minutes played, defensive rebounds, steals, and blocks. I regressed DWS on those stats and then found the relative importance of each regressor (approximately 25% for minutes played, 35% for defensive rebounds, 25% for steals, and 15% for blocks). Since those defensive statistics are not available for past seasons, I used total rebounds as a proxy for defensive rebounds and blocks; and assists as a proxy for steals. A couple more notes: (1) prior to the 1964-65 season, team minutes played were not an official statistic, so for those seasons estimate the team's minutes played using the formula 5 * 48 * (team games) + 125; and (2) prior to the 1967-68 season, team total rebounds included team rebounds, so to account for this multiply the team total by 0.875. Getting back to our example, Robertson's share on the 1964-65 Royals is equal to 0.25 * (3421 / 19325) + 0.5 * (674 / (0.875 * 5387)) + 0.25 * (861 / 1843) = 0.2325.
3. Calculate marginal defense for each player. Marginal defense is equal to (team marginal defense) * (player share). For Robertson this is 417.854 * 0.2325 = 97.151. Note that this formula may produce a negative result for some players.
4. Calculate marginal points per win. Marginal points per win reduces to 0.16 * (team points per game + opponent points per game). For the 1964-65 Royals this is 0.16 * (114.2 + 111.9) = 36.176.
5. Credit defensive Win Shares to the players. Defensive Win Shares are credited using the following formula: (marginal defense) / (marginal points per win). Robertson gets credit for 97.151 / 36.176 = 2.69 Defensive Win Shares.
link (http://www.basketball-reference.com/about/ws.html)
I have a few problems with this methodology.